<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="#" @click="init()">全部</a>
                </li>
                <li v-for="item in subjectNestedList" :key="item.id" :class="{active:oneIndex==item.id}">
                  <a :title="item.title" href="#" @click="getTwoSubject(item.id)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="item in subSubjectList" :key="item.id" :class="{active:twoIndex==item.id}">
                  <a :title="item.title" href="#" @click="gotoPage(item.id)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':buyCountSort!=''}">
                <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
                  <span :class="{hide:buyCountSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':gmtCreateSort!=''}">
                <a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
                  <span :class="{hide:gmtCreateSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':priceSort!=''}">
                <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort==''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list">
            <ul class="of" id="bna">
              <li v-for="course in data.records" :key="course.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="course.cover" class="img-responsive" :alt="course.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+course.id" :title="course.title" class="comm-btn c-btn-1">{{course.title}}</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+course.id" :title="course.title" class="course-title fsize18 c-333">{{course.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green" v-if="Number(course.price)===0">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">{{course.buyCount}}人学习</i>
                      |
                      <i class="c-999 f-fA">{{course.viewCount}}评论</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              href="#"
              title="首页"
              @click.prevent="getCourseList(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="getCourseList(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="getCourseList(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="getCourseList(data.current+1)">&gt;</a>
            <a
              href="#"
              title="末页"
              @click.prevent="getCourseList(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
  import course from "../../api/course";
  export default {
    data(){
      return{
        data:{}, //分页数据
        subjectNestedList: [], // 一级分类列表
        subSubjectList: [], // 二级分类列表
        searchObj: {}, // 查询表单对象
        oneIndex:-1,
        twoIndex:-1,
        buyCountSort:"",
        gmtCreateSort:"",
        priceSort:""
      }
    },
    created() {
      this.getCourseList()
      this.getOneSubject()
    },
    methods:{
      init(){
        //清空条件对象
        this.searchObj={}
        //设置初始值
        this.oneIndex=-1
        this.twoIndex=-1
        this.getCourseList()
      },
      getCourseList(page=1){
        course.getCourseList(page,8,this.searchObj).then(res=>{
          this.data=res.data.data
        })
      },
      //查询一级分类
      getOneSubject(){
        course.getAllSubject().then(res=>{
          this.subjectNestedList=res.data.data
        })
      },
      getTwoSubject(id){
        //点击一级分类
        //设置oneIndex
        this.oneIndex=id
        //清空条件对象
        this.searchObj={}
        //查询数据
        this.searchObj.subjectParentId=id
        this.getCourseList()
        //得到二级分类
        this.subjectNestedList.forEach(item=>{
          if (item.id==id){
            this.subSubjectList=item.children
          }
        })
      },
      gotoPage(id){
        //点击二级分类
        //设置twoIndex
        this.twoIndex=id
        //清空条件对象
        this.searchObj={}
        //查询数据
        this.searchObj.subjectId=id
        this.getCourseList()
      },
      searchBuyCount(){
        this.buyCountSort="1"
        this.gmtCreateSort=""
        this.priceSort=""
        this.searchObj.buyCountSort=this.buyCountSort
        this.getCourseList()
      },
      searchGmtCreate(){
        this.buyCountSort=""
        this.gmtCreateSort="1"
        this.priceSort=""
        this.searchObj.gmtCreateSort=this.gmtCreateSort
        this.getCourseList()
      },
      searchPrice(){
        this.buyCountSort=""
        this.gmtCreateSort=""
        this.priceSort="1"
        this.searchObj.priceSort=this.priceSort
        this.getCourseList()
      }
    }
  };
</script>
<style scoped>
  .undisable{
    display: none;
  }
  .active{
    background-color: #8d4549;
  }
</style>
